Performant Capital, a private equity firm, completed the acquisition of Design Manager, a software developer for interior designers, from 1stDibs, an e-commerce firm. Financial terms were not disclosed. “Design Manager is a comprehensive product and serves a group of customers who represent the very best in the interior design industry. We are excited to provide an investment in this technology platform to deliver an even better product for the customer base,” Jeff Dillon, Performant Capital Partner.